Multiphysics computational analysis of multiferroic composite ring structures

Stampfli, Ryan; Youssef, George

doi:10.1016/j.ijmecsci.2020.105573

Cited by 17 publications

(5 citation statements)

References 25 publications

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“…This attraction and concentration of field are even higher at the top and bottom portions of the ring. This was shown by numerical simulations in our previous works conducted using COMSOL Multiphysics [47,48]. Thus, although location 'C' experiences a lower magnitude of alternating magnetic field, it still shows a better power conversion efficiency due to receiving sufficient bias magnetic field to align Terfenol-D domains.…”

Section: Effect Of Transmitter/receiver Orientationmentioning

confidence: 74%

Parametric investigations of wireless energy transfer using strain-mediated magnetoelectric transmitter-receiver

Kumar,

Newacheck,

Youssef

2023

Smart Mater. Struct.

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Magnetoelectric (ME) composites inherently convert magnetic energy to electrical energy and vice-versa, making them a viable technology in wireless energy transfer (WET) applications. This article focuses on identifying the optimal configuration for achieving relatively high ME power conversion efficiency in a fully ME-based transmitter/receiver composite system. Two configurations of ME composites, one in concentric composite rings and the other in layered laminate formation, have been fabricated and used alternately as transmitters and receivers. The influence of three important parameters has been experimentally studied and reported, including the effect of (1) the magnetization state of the magnetostrictive components and (2) the relative orientation of and (3) the separation distance between the transmitter and the receiver. It has been found that a higher energy conversion efficiency is obtained in a configuration where the laminated plate was used as the transmitter while the ring composites acted as the receiver. Furthermore, the location and alignment of the receiver significantly influence the output transferred power. Lastly, the distance between the transmitter and the receiver has been observed to have an exponential inverse influence on the performance of the investigated WET system. These results have been deciphered by experimentally generating horizontal and vertical magnetic field mapping around the composite systems and capacitance measurement of the piezoelectric element. Thus, this article presents a detailed study of the parameters and their influence on the performance of the ME-based WET technology, which would be extremely useful in designing and optimizing devices based on this technology.

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Section: Effect Of Transmitter/receiver Orientationmentioning

confidence: 74%

Parametric investigations of wireless energy transfer using strain-mediated magnetoelectric transmitter-receiver

Kumar,

Newacheck,

Youssef

2023

Smart Mater. Struct.

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“…As shown in Figure 1 (a), the representative straintronic device structure [18] is employed to study the strain-stimulated magnetic vortex dynamics. The magnetostrictive cylinder nanomagnet consists of Polycrystalline Terfenol-D, whose typical parameters (damping constant α = 0.04 [19], exchange constant A ex = 9.4×10 -12 J/m, magnetostrictive coefficient λ s = 820 ppm [20], saturation magnetization M S = 6.7×10 5 A/m) are employed in the micromagnetic model. The radius R of the nanomagnet is 192 nm, and the thickness L is 20 nm, which ensures that the ground state of the nanomagnet is a vortex.…”

Section: Micromagnetic Modelmentioning

confidence: 99%

Sub-nanosecond magnetic vortex reversal induced by localized resonant strain field in doped nanomagnets

Cui,

Yang,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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The strain-induced magnetic vortex dynamics in nanomagnets with ring-shaped impurities are investigated by means of micromagnetic simulations. It is found that the type and location of impurities can modulate the strain-stimulated spin wave spectrum of the magnetic vortex. Compared with pure nanomagnets without doping, the scattering impurities make the eigenfrequency of nanomagnets higher, while the pinning impurities lead to lower eigenfrequency. Moreover, the spin wave oscillation amplitude in a doped nanomagnet is strengthened by the gradient of exchange energy at the interface between the impurity ring and nanomagnet. The magnetic vortex polarity in a nanomagnet with specific doping schemes can be reversed in a sub-nanosecond scale by a localized resonant strain signal. Besides the switching efficiency improvement, the threshold stress of sub-nanosecond polarity reversal in nanomagnets with specific doping schemes is also reduced compared to the counterpart of nanomagnets without impurities. These results indicate that doping engineering of nanomagnets is a significant method to achieve straintronic devices with higher operating frequency and lower energy consumption.

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“…为了提升磁电换能器的转换效率，达到无线功率传输的最佳效果，需要对层合磁电材料进行建模分析，目前主要采用的方法包括格林函数法 [16] 、弹性力学法 [17,18] 、等效电路法 [19][20][21] 和有限元法 [22][23][24] . 其中，格林函数法的表达式较为复杂，实用性不强.…”

Section: 引言unclassified

“…基于有限元的数值模拟方法，能够充分考虑磁致伸缩材料的非线性本构关系，准确计算三维复杂模型，突破了纯理论分析的限制. Han [23] 、Stampfli 等人 [24] 在非线性层合磁电模型中研究了直流偏置磁场对磁电效应的影响，Zhou 等人 [26] 还在模型中考虑了温度和界面耦合系数的影响，但均未分析谐振状态下的磁电效应. 与低频非谐振态相比，谐振状态下的层合磁电材料具有更高的磁电系数 [27] ，作为换能器使用时，能够获得更高的能量转换效率.…”

Section: 引言unclassified

Resonance magnetoelectric effect analysis and output power optimization of nonlinear magnetoelectric transducer model

Bing-Hong¹,

Xu²,

Xiao³

et al. 2023

Acta Phys. Sin.

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Magnetoelectric composites, comprising piezoelectric and magnetostrictive materials, are widely used in magnetic field sensing, energy harvesting, and transducers. This paper establishes a finite element model of a laminated magnetoelectric transducer coupled with magneto-elastic-electric fields based on the constitutive equations of the nonlinear magnetostrictive materials. Then, the resonant magnetoelectric effect under different biased magnetic fields is studied. Based on the equivalent circuit model and the two-port network theory, the magnetoelectric coefficient and the equivalent source impedance of the resonant state are solved entirely for the first time. Introducing optimized L-section matching networks between the magnetoelectric transducer and the load resistor can increase the load power and expand the operating bandwidth. The simulation results are consistent with the data from references, thus confirming the accuracy and effectiveness of the model. The simulation results demonstrate that the magnetoelectric coefficient reaches 51.79V·cm<sup>-1</sup>·Oe<sup>-1</sup>@51.4 kHz at a 450 Oe bias magnetic field, and reaches the ultimate output power of -3.01 dBm@50.4 kHz at a 350 Oe bias magnetic field. To ensure the load power, the power increase of 2.30 dB and the bandwidth expansion of 2.27 times are achieved by optimizing the matching network. This paper's nonlinear finite element model takes full account of the magnetoelectric effect in the acoustic resonance state and quantifies the ultimate output power. The magnetoelectric transducer model can achieve high magnetoelectric coefficient, load power, and power density in a small volume, providing a significant advantage in terms of equilibrium. The research results are of great importance in guiding the design and performance improvement of miniaturized magnetically coupled wireless power transfer systems.

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Multiphysics computational analysis of multiferroic composite ring structures

Cited by 17 publications

References 25 publications

Parametric investigations of wireless energy transfer using strain-mediated magnetoelectric transmitter-receiver

Parametric investigations of wireless energy transfer using strain-mediated magnetoelectric transmitter-receiver

Sub-nanosecond magnetic vortex reversal induced by localized resonant strain field in doped nanomagnets

Resonance magnetoelectric effect analysis and output power optimization of nonlinear magnetoelectric transducer model

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